Steam-boiler



(No Model.) 2 Sheets-Sheet 1.

S; P. HEDGES.v STEAM BOILER,

110.400.5623. Patnted-Apr.2.1889;

WITNESSES! N. PETERS. PholaLhbognphar, Wgbhingiun. D. C.

2 SheetsShe1 2.

(Nb Model) I v r S. P. HEDGE$.

STEAM BOILER $10,400,568. Patented Apr. 2,, 1889.

WITNESSES //v VE/VTOI? $2M Mm ATTIORIIVEYS.

UNITED STATES PATENT G EICE.

SAMUEL P. HEDGES, OF GREENPORT, NEW YORK.

STEAM-BOILER.

giEGIFiCATION forming part of Letters Patent No. 400,568, dated April 2,1889.

Application filed November 24, 1888. Serial No. 291,763 (No model.)

To all toil/0717 it may concern:

Be it known that I, SAMUEL P. HEDGES, of Greenport, in the county ofSuffolk and State of New York, have invented a new and usefulImprovement in Steam-Boilers, of which the following is a full, clear,and exact description.

My invention relates to an improvement in steam-boilers, and has for itsobject to provide a means whereby a perfect circulation will beobtained, and wherein a single tube or a section of tubes may, ifdamaged, be expeditiously and readily removed and replaced, and wherein,also, the tubes may be conveniently cleaned.

The invention consists in the novel construction and combination of theseveral parts, as will be hereinafter fully set forth, and pointed outin the claims.

Reference is to be had to the accompanying drawings, forming apart ofthis specification, in which similar figures of reference indicatecorresponding parts in all the views.

horizontal section through a slightly-modified form of boiler, thesection being taken upon aline corresponding to a: a; of Fig. 1.

In carrying out the invention I prefer to construct the boiler incylindrical form, but desire it to be understood that I do not confinemyself to this shape.

Within the cylindrical casing 10 at the base two perpendicularwater-legs are located, one leg, 11, at the front, which is U-shaped,the bow section being uppermost, and a straight leg l2 at the rear.

The casing 10 is provided with the usual fire-door, 13, an ash-pit door,14, the said doors being located between the members of the frontwater-leg.

The grate 15, which may be of .any approved construction, ishorizontally supported by the front and-rear water-legs, and the contourof the fire-pot is defined by a series of circularly-bent tubes, 16,connecting the two water-legs at each side, as best shown in Figs.

1 and 3, which tubes are arranged in parallel series one above theother, and are inclined upward from the front to the rear, as best shownin dotted lines, Fig. 1. The interior of the fire-box or the inner faceof the water legs and tubes is preferably provided with aproper liningto prevent them from burning.

Above the fire-box an inverted-T-shaped stand-pipe, 17, is supported byinserting the ends of the horizontal section into the bow portion of thefront water-leg at the center and in the rear water-leg at or near thetop of the same, as best shown in Figs. 1 and A water-inlet aperture isproduced in the outer face of the front water-leg, preferablyinalignment with the axis of the horizontal section of the stand-pipe.The said aperture is illustrated as closed by a plug, 18.

Upon the upper surface of the front waterleg an upwardly and outwardlyextending bracket, 19, is attached, upon which a manifold or header, 20,is supported and secured.

The manifolds consist of a box-like forging, the outer end .whereof isenlarged, as illustrated at 21 in Fig. 2, and provided with a top andbottom aligning aperture, 22, and top and bottom flanges 23, projectinghorizontally outward from each corner.

The body of the manifold or header extends horizontally within thefire-space, and the inner end is made to closely approach the verticalsection of the stand-pipe, as best shown in Figs. 1 and 2. The said bodyportion of the manifold or header is provided at each side with two ormore longitudinally-arranged series of threaded apertures, 24, and thesaid apertures are preferably so grouped that the apertures in one linewill alternate with the apertures in the line above. The outer end ofthe manifold or header is provided with a hand-hole normally .closed bya suitable plug, 25. Any desired number of such holders or manifolds areplaced one upon the other and secured by passing bolts through thecontacting flanges or in any other approved manner whereby a steam-tightjoint may be secured. The upper header or manifold is connected with thevertical section of the stand-pipe by 'a tube, 26, attached to thesurface of the manifold surrounding the aperture 22, as best shown inFig.1. A similar series of manifolds or headers are attached to andsupported by the rear water-leg, 12, which leg is provided at the topwith an opening registering with the lower aperture 22 in the lowermanifold, and the upper aperture 22 of the upper manifold in this rearseries is sealed by a plate, 27, a plug, or equivalent dev1ce.

It will thus be observed that a continuous passage is provided throughthe combined rear headers or manifolds, permitting a free circulationfrom the water-legs up to the capplate 27, and consequently through theseveral series of tubes 28 to the forward manifolds, through which acontinuous passage is also provided from the lower manifold to thestand-pipe. The rear series of manifolds are opposite the front series,and both series contain an equal number; but the bottom manifold of thefront series is located a greater distance above the fire-pot than thecorresponding manifold of the rear series, therefore each manifold ofthe rear series is lower than the corresponding manifold of the frontseries, as best illustrated in Fig. 1. A series of concentricsemicircular tubes, 28, connect the corresponding front and rearmanifolds at each side, the ends of the tubes being secured in thecorresponding side apertures, 24. This connection is preferably effectedby inserting a bushing, 29, having a left-hand exterior thread, into themanifold apertures 2i, and providing the extremities of the tubes witharight-hand thread for insertion into the bushing, as best shown in Fig.4; but other well known or improved means may be employed Withoutdeparting from the spirit of the invention.

It will be observed that by reason of the arrangement of the front andrear manifolds that the tubes are made to incline upward from the rearto the front, and that should any tube become clogged by removing theplug from the hand-hole of the manifold to which such tube is securedasuitable cleaner may be readily inserted into such tube.

By reason of the manifolds being arranged in independent series, shouldany particular set or sets become damaged they may be removed andreplaced, and the boiler thereby repaired at comparatively littleexpense. I desire it, however, to be understood that if in practice itis found desirable each series of manifolds may constitute a singlecasting or forging.

In Fig. 5 I have illustrated a section of a square or rectangular boilerin which the construction is substantially the same as above described,the only difierence being the formation of the body-tubes. Instead ofbeing bent to a semicircular form, they are essentially U-shaped, andmay consist of a single tube so bent or several sections united byelbows.

In operation the water entering and passing down the front leg, 11, isforced upward by the heat through the fire-box tubes 16 into the rearleg, 12, and thence up into the rear manifolds, through the tubes 28,into the front manifolds, and with the steam generated passes throughthe tube 26 into the standpipe 17, and the water passing up with thesteam drops down into the horizontal section of the stand-pipe, andagain makes the circuit of the manifolds, as indicated by the arrows.

The upper tubes, 28, the manifolds,and the stand-pipe are keptconstantly heated by the products of combustion passing upward aroundand in contact with them, which products find an escape through theoff-take flue 30.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is-

1. In a steam-boiler, the combination, with opposing series ofhorizontally non-aligning manifolds or headers, of inclined concentrictubes connecting the corresponding manifolds of each series,substantially as shown and described.

2. In a steam-boiler, the combination, with opposing series ofhorizontally non-aligning manifolds or headers provided with a series ofalternating apertures in the sides, of inclined semicircular tubeshaving their ends inserted in the equivalent apertures of thecorresponding manifolds of each series, substantially as shown anddescribed.

3. In a steam-boiler, the combination, with an essential U-shapedwater-leg at the front of the fire-box and an essentially perpendicularwater-leg at the rear of the said fire-box, of a series of inclinedsemicircular tubes connecting the members of the front water-leg withthe rear leg, substantially as shown and described.

4. In a steam-boiler, the combination, with a front and rear water-legand inclined semicircular tubes connecting the said legs, of opposingseries of horizontally non-aligning manifolds or headers, inclined tubesuniting the corresponding manifolds, and a connection between one seriesof manifolds and the rear water-leg, substantially as shown anddescribed.

5. In a steam-boiler, the combination, with a front and rear Water-leg,an 'inverted;T- shaped stand-pipe connecting the Water-legs at the top,and a series of semicircular inclined tubes uniting the said legs belowthe stand-pipe, of a series of front and rear horizontally non-aligningmanifolds or headers, a series of inclined tubes connecting thecorresponding manifolds of each series, and a connection between therear manifolds and the rear water-leg and between the front manifoldsand the stand-pipe, substantially as shown and described.

' SAMUEL P. HEDGES.

\Vitnesses:

J. F. ACKER, J r., C. SEDGWICK.

